Multispindle metal-grinding machine.



W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00T..26. 1907.

Patented June 22, 1909.

W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION TILED 00T.Z8. 1907. Patented June 22' 19 SHEETSSHEET 2.

witnesses.

W. LE R. BRYANT. MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED OUT. 26, 1907. 925,867. Patented June 22, 1909.

19 SHEETS-SHEET 4.

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MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00T.28, 1907.

Patented June 22, 1909.

W. LE R. BRYANT.

MULTISPINDLB METAL GRINDING MACHINE.

APPLICATION FILED 0013.26, 1907.

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W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00128, 1907. 925,867. Patented June 22, 1909.

19 SHEETS-SHEET 7.

W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00mm, 1901.

925,867. Patented June 22, 1909.

SHEETS-SHEET 8.

W5 #22 2% 12g 70 3% m W. LB R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE APPLICATION FILED 00126, 1907.

Patented June 22, 1909.

19 SHEETS-SHEET 9.

W. LB R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00T.28. 1907.

19 BHEETB-BHEBT 10.

W. LE R. BRYANT. MULTISPINLLE METAL GRINDING MACHINE.

19 sums-sum 11.

W. LB R. BRYANT. HULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 001228, 1907. 7 925,867. Patented June 22, 1909.

19 SHEETS-SHEET 12.

W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE}.

Patented June 22,1900

' is: QQLW APPLICATION FILED 0OT.26, 1907.

W. LB R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE,

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APPLICATION FILED 00120, 1907.

witnesses. *sflm W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED OCT. 28, 1907.

Patented June 22, 1909.

19 SHEETS-SHEET 15.

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W. LE R. BRYANT.

MULTISPINDLE METAL GRINDING MACHINE.

APPLICATION FILED 00T.26, 1907.

925,867. Patented June 22, 1909.

19 SHEETS-SHEET 16,

W. LE R. BRYANT.

MULTISPTNDLE METALGRINDING MACHINE.

APPLIUATION IILED 00T.26, 1907.

Patented June 22, 1909.

19 SHEETS-SHEET 17 W. LE R. BRYANT. MULTISPINDLE METAL GRINDING MACHINE.

APPLIOATIOK rum) 0012s. 1907.

' 925,867.- Patented June 22, 1909.

19 SHEETS-SHEET 18.

I II I [III III/ll Ill/ll/l/l/I UNITED STATES T QFFIC.

WILLIAM LE ROY BRYANT,

or SPRlNGFIELD, VERMONT.

MULTISPINDLE METAL-GRINDING MACHINE.

To all whom it may concern:

Be itknownthat I, \VILLIAM LE ROY BRY- ANT, of Springfield, in the county of \Vindsor and State of Vermont, have invented certain new and useful Improvements in Multispindle MetaLGrinding Machines, of which the following is a specification.

In modern machine shop practice, the best results are secured in the prbduction of turned work by roughing out the work with a lathe or special machine, and then finishing it by means of a grinding tool. Where the finishing Operation necessitates the removal of a small amount of stock, a grinding tool is particularly desirable for accomplishing that result, since the removal of the small amount of stock may be done accurately and speedily.

The object of the present invention is to provide a machine for grinding and finishing turned work and for forming thereon external or internal tapers or shoulders as the character of the work may require.

Generally speaking, the invention comprises a plurality of grinding tools of different shapes, sizes and abrading qualities which may be succ ssivcly brought. into operative relation to the work without necessitating a change or removal of the piece of work. 'l he various grinding tools are mounted upon spindles which may be driven at the particular speed it is desirable to rotate the grinding tools thereon. These spindles are mounted upon a rotatable turret located upon a carriage, so that the turret may be retated to bring any desired grinding tool into operative relation to the work, and the carriage may be advanced and retracted to feed the tool relatively to the work. The work holder consists pn'eferahly of a spindle having thereon a chuck or other device for receiving the work. The work holder is rotated and is mounted on slides, in consequence of which it may be moved in lines parallel to its axis and also in lines transverse to its axis. 'lhesc slides are preferably located upon a support 01 table which may he swung about an axis perpendicular to the axis oi' the chuck so as to hold the work either in parallelism with the grinder, or at an. angle thereto for the production of a taper. The machine, as illustrated, is of the semiautomatic type, in that the rotation of the turret for the grinder spindles to present the grinding tools to the work is effected manually, although l have contemplated the provision of automatic mechanism for securing thisresult.

Specification of Letters Patent.

Application filed October 26, 1907.

Patented June 22, 1909.

Serial No. 399,334.

Inaddition to the grinding tools, I'employ a turning tool which is not rotated, but which is mounted in the turret so that it may be brought into proper relation to the work.

In the grinding of a piece of shouldered work, it is necessary to first neck the work (i. e. fornra groove therein) to provide the proper clearance for the grinding tool. Heretofore this has been accomplished by a separate lathe, but this I regard as bad practice, for the reason that the groove or clearance thus formed may not be concentric with the finished ground surface. To prevent this possible error, I provide the turning or necking tool mounted upon the turret, so that after the work has been secured in the work spindle, it may be first. necked and then ground.

Referring to the accompanying drawings, Which illustrate one embodiment of the invention, to the details of construction of which the invention is not limited however- Figure 1 illustrates the machine in side elevation. Fig. 2 represents an elevation of one end of the machine. Fig. 3 represents an elevation of the other end of the machine. Fig. 4 represents the machine in plan view. Fig. 5 is a longitudinal vertical section on the line a:-;r of Fig. 4-. Fig. 6 is a longitudinal vertical section on the line 'y' 1 of Fig. 4. Fig. 7 represents a longitudinal vertical section through the machine. Fig. 8 illustrates in plan view the grinder spindles and the turret. Fig. 9 illustrates substantially the same mechanism in front elevation, partially in section. Fig. iOrepresentsa section on the line 10-10 of Fig. 1. Fig. 11 illustrates a section on the line 1i--1i of Fig. 9. Fig. 12 represents a section on the line 12 12 of Fig. i] and illustrates one of the adjustable stops. Fig. 13 represents a section on the line THE--12) of Fig. S). Fig. 14 illustrates a section through one of the spindles and one of the knock-oil bars. Fig. 15 illustrates in front view a portion of the automatic turret-rotating mechanism by which the grinding tools are fed transversely with relation to the work. Fig. 16 represents a section on the line 16- -16 of Fig. 15. Fig. 17 represents in 1 vertical transvi-irse section a portion of the mechanism for effecting the operation of the turret-rotating mechanism. Figs.- l8 to B l inclusive illustrate details of the construction thereof. Figs. to 28 inclusive illustrate thelongitudinally movable bars which form a part of the devices which cause the opera 

